iFume Manual


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iFume Manual



Should always be ordered in advance of requirement from Purex or your authorised local agent.

Replacement filter part numbers are shown on the corner of the original packaging and also on the label on the inside of the door cabinet. Please ensure you make a note for future reference.

Spare parts

When requesting spares please quote the model and serial number of your system. These details can be found on the specification label at the rear of the machine or by pressing the support button on the touchscreen display.



 The use of filters other than those supplied by Purex or an authorised agent will invalidate any warranty, service contract and any LEV certification !

  • Always isolate the system from the mains power supply before opening any doors or lids.
  • Disposable gloves and a dust mask are supplied with replacement filters. they should be worn when removing Dispose used filters in the bag provided
  • Filters are manufactured from non-toxic materials.
  • Filters and prefilters are not re-usable and no attempt should be made to clean them.
  • Used filters and prefilters should be disposed of in accordance with local laws and regulations. The company and its agents disclaim all liability and responsibility for any harm, damage, contamination or injury caused by inappropriate or unlawful disposal.
  • Purex systems use high pressure pumps, which may cause inferior filters to burst, allowing hazardous fumes into the Do not use filters that have only been tested to BS3928, BS5295 or AS208C as these standards are flow checks only and are designed to test filters used in general dust extraction and air conditioning.
  • Consult the local regulations concerning fume extraction systems, as these may be subject to requirements including; periodic checks by authorised agencies, re-issue of certificates of compliance or equivalents etc. Consult your supplier if in doubt.
  • Consult your supplier for information on maintenance agreements that will ensure conformance to local regulations.



Primary maintenance is filter replacement, the machine control system will indicate when this is required. Filters should be replaced annually as a matter of course.

To ensure the smooth running of the extraction machine and associated equipment, please perform the following periodic checks:

Daily                 – Visually check that the fumes are being drawn into the extraction point

– Check the status of the display screen

Annually          – Change filters and consult your supplier for maintenance checks and/or certification


Positioning the machine

The machine should be as near to the process as possible with space allowed for the following access:

  • Internal maintenance
  • Control panel, replacing filters
  • Exhaust air + cooling air, electrical connections, hose connection Once in position, lock the two front castors by depressing the foot levers.

Hose connection

Incorrect connection or layout of hose can cause poor airflow, blockages and potentially dangerous build up of fume. Use the shortest length of hose possible and keep bends to a minimum. Your supplier can advise you of appropriate diameters and layouts of hose for your particular application.

  • It is best practice to use the connection kit supplied.
  • The use of small diameter pipe / hose or nozzles can reduce the performance of fume extraction systems and so should be avoided
  • If a special connection kit or attachment is required please contact Purex or your local agent.

Ensure all connections are properly sealed and that there are no kinks in the hose. Once secured in position, connect the hose/s to the inlet/s on the machine either by pushing the hose onto the inlet or by using the connections supplied.

Electrical connection

Various connection methods are available to order. Prior to connecting the power supply, ensure that the voltage, frequency and power requirements are correct as shown on the label attached to the cabinet rear ( Note – these are MAX values). It is important that the local supply is protected by a circuit breaker of the correct rating, and that the cabling and plug type used are similarly rated. Ensure the plug is accessible as a disconnect device.

For 800/800i series machines it is advised that a rotary isolator switch is used as a power disconnect device.

Interface Socket

When not in use this socket is protected by a screw-on cap.


To enable interfacing unscrew the interface socket cap and plug in the interface cable or remote ON/OFF switch. Connect the other end of the interface cable or remote ON/OFF switch to your related machine. Please note there is only one interface socket so an interface cable and the remote ON/OFF switch cannot be used together.


Use of unapproved cables or interfacing connections may invalidate your warranty.


Installing The Machine

(refer to illustrations on page 7)


Touchscreen control system

The touchscreen control system gives the operator clear indication of machine and filter status at a glance, designed with ease of use in mind, making the iFume series usable by operators with minimal training.


Touch Screen Display:

(refer to illustration on page 8)

1: Actual flow rate

2: Actual flow indicator

3: Target flow indicator

4: Increase flow

5:  Decrease flow

6: Motor capacity % used

7: Temperature

8: Running / Stopped indicator

9: Filter status indicator

10: Filter status indicators

11: Stop / Start button

12: Local / Remote indicator

13: Support button

14: Machine model




Actual flow rate (1)

This shows the actual flow rate being achieved and can be displayed as either M3/h (metres cubed per hour) or CFM (cubic feet per minute).


Actual flow indicator (2)

This shows the actual flow is achieving its target.


Taget flow indicator (3)

This shows the target position that the actual flow indicator has to reach.


Increase/Decrease flow (4+5)

The “+” button increases the set point by raising the target flow indicator. The “-” button decreases the set point by lowering the target flow indicator.


Motor speed (6)

This is a real time indication of motor speed shown as a percentage, from 0-100%.


Temperature (7)

This is the exhaust air temperature. If the air temperature rises above the factory preset limit the machine will give an intermittant audiable alarm and the temperature indicator will turn yellow.

If the temperature continues to increase an audiable alarm will repeat and the temperature indicator will turn red.


Running / Stopped indicator (8)

The run indicator displays status of the motor.

It will also indicate motor failure and hose blocked alarms.


Filter status indicator (9)

The message bar displays if gas or particulates are passing through the filters.


Filter status indicators (10)

The filter status indicators independently monitor filters, recognising the specific filter with the issue.


Stop / Start button (11)

Use this button to stop and start the machine manually.


Local / Remote indicator (12)

This shows if the extractor is controlled through an interface connection. It will display “Remote” when running, locking the stop/start button from the operator. If the interface is not controlling the extractor, the indicator will show “Local” allowing user operation of the screen.


Support button (13)

Button for accessing the support screen


Machine model (14)

Displays the model number of the machine.


Setting The Machine For The First Time

Max Flow:

Ensure the machine is fitted with the connection kit or attached to ducting. In order to achieve the maximum efficiency from your extractor and filter set the max flow as follows.

Ensure the system is set up as it would be running normally, with any valves on extraction arms open, and nothing to cause an obstruction.

  • Press the “Support”
  • Press the “Setup”
  • Enter code “2603”.
  • Press the “Enter”
  • Press the “Set Max” button. The machine will now run for approximately 10
  • Press the “Back ” button to return to the main

The Extractor has now checked the system and calibrated the machine to give the most efficient extraction and filter life possible, it is ready to use.


Switching the machine ON/OFF

To switch the machine ON press the green ‘Start’ button on the touch screen display. The button will turn red and display the next button available, “Stop”. “Running” will also appear on the display, and the actual flow indicator on the left side of the screen will meet the target flow indicator.

Adjusting the airflow rate

To adjust the airflow press the “+” button to increase the airflow, or the “-” button to decrease the flow rate. The actual flow indicator bar will rise or fall to meet the required target flow.

The actual airflow measurement is shown on the display above the actual flow indicator. Motor speed is shown as a percentage at the bottom of the flow indicator.

What airflow rate to set?

Each machine is factory set at 50% of its capacity. Check the fumes are being removed by site observation and appropriate measurement. Then increase or decrease the flow rate as appropriate. Please note that setting the flow level unnecessarily high may reduce filter life.



(refer to illustrations on page 11)

 Special features:

The special features can be customised in the setup screen. To access the set up menus:

  • Press the “Support”
  • Press the “Setup”
  • Enter code “2603”.
  • Press the “Enter”

(BUTTON) Press this button to change the alarm relay state from normally open to normally closed.

(BUTTON) Press this button to convert all units between metric and imperial settings.

Metric settings will display the flow rate as M3/h and the temperature as centigrade.

Imperial settings will display the flow rate as CFM and the temperature as fahrenheit.

(BUTTON) Locks buttons 4 & 5 on page 8.

(BUTTON) Engineer setting only. Please contact your supplier for assistance.

Run on timer
This is only for machines using the interface connection (process controlled units e.g. lasers). When the process (e.g. laser) finishes, the iFume remains on for the amount of seconds indicated.

(BUTTON) Press this button to go back to the previous screen.

Full user lockout
It is possible to prevent any user or operator from pressing the stop/start button or changing the flow using the + and – buttons. The iFume will be controlled by a process controlled unit, such as a laser. Connect the iFume to the process controlled unit (e.g laser) using a Purex interface cable. Set the required flowrate then select the “Lock On” button as above.



Important note:

Always check the extraction nozzle, flexible hose, pipework and the air inlet for debris build up before changing any filter. This avoids false alerts related to airflow.

Replacing filters

The touchscreen will display “Order Main Filter” and/or “Order Pre-Filter” when the filters are partially blocked, please contact your supplier to order filters.

The touchscreen will then display “Replace Main Filter” and/or “Replace Pre-Filter” when the filters are blocked, change the filters immediately.

Changing filters

The machine will warn you with audible and visible alerts if a filter is exhausted (see warning and alarm signals). The display will flash the icons of the filters which need attention. Take care when removing main filters as they are heavy. Always wear the protective gloves and mask provided and dispose of used filters in the bag provided. Protective eyewear should also be worn when changing filters.

Opening the filter compartment door

  • Ensure your process is stopped
  • Switch off your Purex machine at the control panel (see Touchscreen control system)
  • Turn the door lock/s on the front of the filter compartment door
  • Open the door

Changing the pre-filter

200/400/800 – Always change the pre-filter first (unless recently changed) and restart the machine. If the alert continues, change the main filter. To remove the pad, first remove the main filter and turn it over (See Changing the main filter). Remove the pad and replace it with a new one. Make sure the harder, smoother side of the pad is facing the main filter. Turn the filters the correct way round and place back in to the extractor. (See picture “Pre-filter pad” above).


200i/400i/400i PVC/300i/800i – All have Labyrinth pre-filters which can be removed by pulling the filter off the air inlet inside the machine before replacing with a new one. 400i PVC machines also have an adsorbent pad in the base of the machine underneath the Labyrinth filter. This should be replaced at the same time as the Labyrinth filter. It is also good practice to wipe the inside of the machine periodically with a cloth to avoid build up of liquid. Suitable protective clothing should always be worn.


Changing the main filter

  • Open the door
  • Turn the filter locking handle (5) 180° anti-clockwise so that it is horizontal and in the filter unlocked position
  • The filter (3) should drop slightly to allow release
  • Remove the filter by sliding it towards you and remove it completely from the machine
  • Insert the new filter (completely) into the machine ensuring that the airflow arrow on the label (6) is pointing up
  • Turn the filter locking handle 180° clockwise so that it is horizontal and in the filter locked position
  • Close and lock the door and restart the machine


Notes: The 800i 3-tier has two main filters, always ensure you are replacing the correct one.



(refer to illustrations on page 13)



(refer to illustrations on page 14)



Indicator Problem Action
Motor Fail Indicates that the motor has failed in the extractor Contact your supplier.
Hose Blocked Indicates the hose connection is obstructed Remove all connection hoses and check

for obstructions. Check that any valves in the system are in the open position and have not been

closed accidently.

Door Open Indicates that a door to a filter compartment is open Check that all filter compartment doors on the extractor are closed, check for obstructions preventing the doors from closing.


Indicates Gas warning (yellow) Order replacement main filter.


Indicates Gas alarm (red) Replace main filter.
Particulate (Yellow) Indicates Particulate warning (yellow) Order replacement main filter.
Particulate (Red) Indicates Particulate alarm (red) Replace main filter.
Temperature (Yellow) Temperature warning, the process

air is too hot or the extractor is at risk of overheating

Check there is nothing blocking the cooling vents on the rear of the extractor.

Check the process temperature.

Temperature (Red) Temperature alarm, the process air is too hot or the extractor is overheating Check there is nothing blocking the cooling vents on the rear of the extractor.

Check the process temperature. Turn off extractor.

Indicator Problem  Action
Odour or particles in exhaust air but there is no alert from the machine. The exhaust monitor unit inside the machine may have developed a fault. Check all cables and connections first. Then contact your supplier.
 Airflow insufficient to remove fume when the filter is not blocked.  Airflow set too low or possible airflow leak or a blockage. Increase airflow. If problem persists then check all nozzles, hose/pipe connections and the vacuum sensor tube (if fitted) for leaks / blockages.
Control signal to/from interfaced equipment is incorrect. Equipment is not switched on alarm condition. Electrical problem. Check all cables and connections and interfaced equipment.
The exhaust monitor unit inside the machine may have developed a fault. Check all cables and connections first. Then contact your supplier.
The control PCB inside the machine may have developed a fault. Check all cables and connections first. Then contact your supplier.
 Relay state requires changing  See page 11 to change.
 Screen is not illuminated.  Power supply absent or incorrect. Check all cables and connections and ensure the power supply matches the requirements of the machine.
 Circuit breaker tripped.  Reset breaker on the rear of the machine.
The control PCB inside the machine may have developed a fault. Check all cables and connections first. Then contact your supplier.
 A filter has a shorter than expected life. A problem with the pre-filter can cause main filter life to be reduced. Check the pre-filter which may be damaged or missing.
The process may have changed or increased in duration. Are different materials being used? Check if any factors have changed. If the problem persists then contact your supplier.
Circuit breaker tripped or fuse blown on power supply.  May indicate a serious fault.  Consult your supplier.



Useful Contacts:


Press the “Support” button on your touchscreen.


Purex International Limited


E: support@purex.co.uk

T: +44 (0)1405 746 030





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Spare parts including replacement filters : 3 months from installation or 4 months from despatch

Used and ex-demonstration equipment: 3 months from installation or 4 months from despatch

In the case of any breach of warranty then Purex shall at its option remedy such defects or refund such sums as the Purchaser has paid to Purex in respect of such Goods. Purex shall be under no liability under the above warranties:

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8.    Termination

  • Purex may at any time by notice in writing to the Purchaser terminate the Contract with effect from the date of service of such notice if:
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